Hi @suzlbrown,
Greetings from McAfee.
Please try the following:
- Open another browser than Firefox
- Download https://downloads.truekey.com/firefox... to your desktop
- Open Firefox and visit about:addons
- Drag the xpi file inside Firefox and say yes to the installation prompts
You may also refer to the below McAfee article
How to add True Key to your browser
Once the True Key extension is added to the browser, it will be activated
To know how to install and login to True Key, please refer the below McAfee article
How to download and install True Key
For further queries related to True Key you may use the below McAfee article or contact our McAfee support
FAQs for True Key: Windows
Regards,
Abhi